3 to 4 Speed Conversion

Was it any more economical than converting the trans? Jus asking

IDK as another member put it up for sale at a great price and I grabbed it knowing I would need it.

To be honest, it’s the first I’ve heard about converting the mainshaft and extension. I would guess unless one already had the parts, people are reluctant to part out a transmission and would rather sell it whole. With that conversion do you lose the rear bearing which dies make the B & T 833 a pretty stout piece.